CfgEnv

revm_context::cfg

Struct CfgEnv 

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#[non_exhaustive]
pub struct CfgEnv<SPEC = SpecId> {
    pub chain_id: u64,
    pub tx_chain_id_check: bool,
    pub spec: SPEC,
    pub limit_contract_code_size: Option<usize>,
    pub limit_contract_initcode_size: Option<usize>,
    pub disable_nonce_check: bool,
    pub max_blobs_per_tx: Option<u64>,
    pub blob_base_fee_update_fraction: Option<u64>,
    pub tx_gas_limit_cap: Option<u64>,
    pub disable_eip3607: bool,
}
Expand description

EVM configuration

Fields (Non-exhaustive)§

This struct is marked as non-exhaustive
Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.
§chain_id: u64

Chain ID of the EVM. Used in CHAINID opcode and transaction’s chain ID check.

Chain ID is introduced EIP-155.

§tx_chain_id_check: bool

Whether to check the transaction’s chain ID.

If set to false, the transaction’s chain ID check will be skipped.

§spec: SPEC

Specification for EVM represent the hardfork

§limit_contract_code_size: Option<usize>

Contract code size limit override.

If None, the limit will be determined by the SpecId (EIP-170 or EIP-7907) at runtime. If Some, this specific limit will be used regardless of SpecId.

Useful to increase this because of tests.

§limit_contract_initcode_size: Option<usize>

Contract initcode size limit override.

If None, the limit will check if limit_contract_code_size is set. If it is set, it will double it for a limit. If it is not set, the limit will be determined by the SpecId (EIP-170 or EIP-7907) at runtime.

Useful to increase this because of tests.

§disable_nonce_check: bool

Skips the nonce validation against the account’s nonce

§max_blobs_per_tx: Option<u64>

Blob max count. EIP-7840 Add blob schedule to EL config files.

If this config is not set, the check for max blobs will be skipped.

§blob_base_fee_update_fraction: Option<u64>

Blob base fee update fraction. EIP-4844 Blob base fee update fraction.

If this config is not set, the blob base fee update fraction will be set to the default value. See also CfgEnv::blob_base_fee_update_fraction.

Default values for Cancun is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_CANCUN and for Prague is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_PRAGUE.

§tx_gas_limit_cap: Option<u64>

Configures the gas limit cap for the transaction.

If None, default value defined by spec will be used.

Introduced in Osaka in EIP-7825: Transaction Gas Limit Cap with initials cap of 30M.

§disable_eip3607: bool

EIP-3607 rejects transactions from senders with deployed code

In development, it can be desirable to simulate calls from contracts, which this setting allows.

By default, it is set to false.

Implementations§

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impl CfgEnv

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pub fn new() -> Self

Creates new CfgEnv with default values.

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impl<SPEC: Into<SpecId> + Copy> CfgEnv<SPEC>

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pub fn blob_base_fee_update_fraction(&mut self) -> u64

Returns the blob base fee update fraction from CfgEnv::blob_base_fee_update_fraction.

If this field is not set, return the default value for the spec.

Default values for Cancun is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_CANCUN and for Prague is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_PRAGUE.

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impl<SPEC> CfgEnv<SPEC>

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pub fn new_with_spec(spec: SPEC) -> Self

Create new CfgEnv with default values and specified spec.

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pub fn with_chain_id(self, chain_id: u64) -> Self

Consumes self and returns a new CfgEnv with the specified chain ID.

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pub fn enable_tx_chain_id_check(self) -> Self

Enables the transaction’s chain ID check.

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pub fn disable_tx_chain_id_check(self) -> Self

Disables the transaction’s chain ID check.

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pub fn with_spec<OSPEC: Into<SpecId>>(self, spec: OSPEC) -> CfgEnv<OSPEC>

Consumes self and returns a new CfgEnv with the specified spec.

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pub fn with_max_blobs_per_tx(self, max_blobs_per_tx: u64) -> Self

Sets the blob target

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pub fn set_max_blobs_per_tx(&mut self, max_blobs_per_tx: u64)

Sets the blob target

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pub fn clear_max_blobs_per_tx(&mut self)

Clears the blob target and max count over hardforks.

Trait Implementations§

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impl<SPEC: Into<SpecId> + Copy> Cfg for CfgEnv<SPEC>

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fn is_block_gas_limit_disabled(&self) -> bool

Returns true if the block gas limit is disabled.

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type Spec = SPEC

Specification id type, it requires to be convertible to SpecId so it can be used by default in mainnet.
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fn chain_id(&self) -> u64

Returns the chain ID of the EVM that is compared with the transaction’s chain ID.
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fn spec(&self) -> Self::Spec

Specification id
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fn tx_chain_id_check(&self) -> bool

Returns whether the transaction’s chain ID check is enabled.
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fn tx_gas_limit_cap(&self) -> u64

Returns the gas limit cap for the transaction. Read more
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fn max_blobs_per_tx(&self) -> Option<u64>

Returns the maximum number of blobs allowed per transaction. If it is None, check for max count will be skipped.
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fn max_code_size(&self) -> usize

Returns the maximum code size for the given spec id.
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fn max_initcode_size(&self) -> usize

Returns the max initcode size for the given spec id.
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fn is_eip3541_disabled(&self) -> bool

Returns whether the EIP-3541 (disallowing new contracts with 0xEF prefix) is disabled.
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fn is_eip3607_disabled(&self) -> bool

Returns whether the EIP-3607 (account clearing) is disabled.
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fn is_eip7623_disabled(&self) -> bool

Returns whether the EIP-7623 (increased calldata cost) is disabled.
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fn is_balance_check_disabled(&self) -> bool

Returns whether the balance check is disabled.
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fn is_nonce_check_disabled(&self) -> bool

Returns whether the nonce check is disabled.
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fn is_base_fee_check_disabled(&self) -> bool

Returns whether the base fee check is disabled.
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fn is_priority_fee_check_disabled(&self) -> bool

Returns whether the priority fee check is disabled.
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fn is_fee_charge_disabled(&self) -> bool

Returns whether the fee charge is disabled.
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fn memory_limit(&self) -> u64

Returns the limit in bytes for the memory buffer.
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impl<SPEC: Clone> Clone for CfgEnv<SPEC>

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fn clone(&self) -> CfgEnv<SPEC>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<SPEC: Debug> Debug for CfgEnv<SPEC>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<SPEC: Default> Default for CfgEnv<SPEC>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'de, SPEC> Deserialize<'de> for CfgEnv<SPEC>
where SPEC: Deserialize<'de>,

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<SPEC: PartialEq> PartialEq for CfgEnv<SPEC>

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fn eq(&self, other: &CfgEnv<SPEC>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<SPEC> Serialize for CfgEnv<SPEC>
where SPEC: Serialize,

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl<SPEC: Eq> Eq for CfgEnv<SPEC>

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impl<SPEC> StructuralPartialEq for CfgEnv<SPEC>

Auto Trait Implementations§

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impl<SPEC> Freeze for CfgEnv<SPEC>
where SPEC: Freeze,

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impl<SPEC> RefUnwindSafe for CfgEnv<SPEC>
where SPEC: RefUnwindSafe,

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impl<SPEC> Send for CfgEnv<SPEC>
where SPEC: Send,

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impl<SPEC> Sync for CfgEnv<SPEC>
where SPEC: Sync,

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impl<SPEC> Unpin for CfgEnv<SPEC>
where SPEC: Unpin,

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impl<SPEC> UnwindSafe for CfgEnv<SPEC>
where SPEC: UnwindSafe,

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where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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